Author
- Pietro Bembo1
- Pietro Marcello1
- Pius III1
- Pliny the Younger1
- Porphyry1
- Portugal1
- Prague1
- Proclus1
- Prudentius1
- Pseudo-Cicero1
- Pseudo-Joachim of Fiore1
- Ptolemy1
- Qasem-e Anvar1
- Qāsim ibn Yūsuf Abū Naṣrī Haravī1
- Rasūl ibn Ṣāliḥ Āydīnī1
- Real Monasterio de Santa Clara1
- Regia Camera (Duchy of Milan)1
- Regiomontanus1
- Republic of Venice1
- Revanî1